Dentist&#39;s and doctor&#39;s lamp



March 22, 1932. H WALTHERS 1,850,219

DENTISTS AND DOCTORS LAMP Filed Jan. 8} 1931 v elm,

Patented Mar. 22 1932 a i i 1,850,219

UNITED STATES PATENT OFFICE;

, Application filed January 8, 1931. Serial No. 507,378;

r This invention relates to improvements in peutic rays into the throator onto other. porlamps and has reference more particularly to tions ofthe body, i a lamp adapted for use by dentists and do'c- Having thusbriefly described the inventors forilluminating cavities of the body andtion, the same will now be described in detail, m for simultaneouslyreflecting the illuminated and for this purpose reference will be had to5. surfaces ina mirror. the accompanying drawings in whichthein-Dentists often find it necessary to show the vention has beenillustrated in its preferred patients the condition of their mouth and fform, and in which: y teeth and to point out cavities and other de- Fig.1 shows a side elevation oftheim- 19 fects and also to show theappearance of proved lamp showing the same in place on a appliancesafter they have been put in place. stationary support; I Without somespecial means for illuminating Fig. 2 is a front elevation of the lamphousthe mouth and for reflecting animage so that i lg showing thecovers'and the mirror; the patient may see the inside of his mouth Fig.3 is a section taken on line 33, Fig. 2; 1; while it is brightlyilluminated, it is very 4 s a p n Vi w Of the as estos cover; difficultto show a patientthe appearance or Flg. 5 is an elevation correspondingto the co diti n f hi o th one shown in Fig. 2 andshows the two covers IIt is the object of thisi nvention to produce rotated relative ac other;

a lamp of a simple construction that can be F g- 6 i a frOIlt ev ionshowing as1ight-- 20 held in the hand or which can be fastened ymodified form of cover; to a stationary supportattached to the dental g-7 a i taken on line unit and which shall be so constructed that lgk I itwill throw a strong beam of light forg- 8 is a plan View Of a mirrorof awardly and at the same time shield the light gh ly fl' m; i 25 sourcefrom the eye of the observer; lamp Flg. 9 is a vertical section througha rei is provided with a 'mirror whose reflecting I f & modified o uctsurface is in the direction of the beam of light Fig- 10 i a sectionshowing the joint in the andin which the patient can see the surface ngy meallsvof which t covers are Secured illuminatedrwhen he holds thelamp in front in p d. Y 30 of his face. i I Fig. 11 is adiagrammaticview showing I This invention, briefly described, consiststhe manner in which the device is used. of a hollow reflector withinwhich is located In the drawings reference numeral 1 rep- I anincandescent lamp. 5 The open end of, the re nts a reflector whi h maybe of the ordia reflector isclosed bymeans of an asbestos nary parabolictype and which is provided 5 cover that is providedwith an openinglowith anoutwardly extending flange'2- Lo- 8r: cated between the lampand the edge of the cated within the reflector is a lamp 3 that' isreflector. A metalcover of substantially the ured in & SOOket 4 ofordinary construcsameshape and size'as the asbestos cover is i II- v Thlamp and reflector are secured to v placed on the outside of the latter,and the the end of a handle 5 by means of a bayonet 0 two fastenedv tothe edge of the reflector so connection shown in thedrawings and whereasto hold'the two covers securely inplace the lamp is to be secured to-astationary memthereon.v Secured to the outer cover is a her like thatindicated by reference numeral mirror that is located above the centerof the v a clamping device 7 is provided. This lamp and when the lamp isheld infront of clamping device is connected to the handle the face,light will be projected through the by means of a strap 8 and a ball andsocket .openings in the two covers and by looking. joint connection 9 isprovided between the into the mirror a. good View can be obtainedclamping device and the strap. Located in l of the surface illuminated.Instead of an front of the lamp so as 0 C e 1 11 end ,ordinary lamp atherapeutic lampfmay be of the reflector is an asbestos cover 10. Thisemployed forthe purpose of projecting theracover has an opening shapedlike the one in; 199

side of the asbestos-covemiswa metal 100ml that is substantially thesame size and the same shape. The two coversaareiheldaiin place in theopen end of the reflector by means of a ing 16 which has achannelsha-pecross section and extendsover the flange 2 of thereflector and overithe'edges ofthe covers. .The .two ends of ithe ring arecon- .nected 'bymeans'of ajointzlikethat shownin Fig: 10' .from 'which it will be seenthat the i -endkl7;is.sliglitl enlarged :so as to enclose 'i the'iother"end of ,the ring. Notches' 18' are of theopeiiiing 11 'is corrugated asin icated by reference numeraIQO'in Fig.3, and theretorethe light that"is reflected will be.dis-' providdin one 'endand the end 17 has aninwardly extending tooth "l9that engages in the-time notches-sothatthetensionof the.

"ringcan be adjusted.

The surface of the reflector directl .ba'ck persed -to a" considerablevextent. Secured to the outer surfacefof the'imetal cover d5'is a this,1nirror hasthefshape of a 'se ment'of a .edges 22. The mirrorfisheldinplace by 24 also serve as handles forrotatingthe metal cover about theasbestos. cover ..so as to decrease the size of the opening, allasshown'in "Fig. 5. The lamp 3 ispreferably a low voltage lamp. of .sixvolts. and .is connected 'to the "lighting circuitofithe buildingby'means of Y a "transformer '25" that reduces the voltage.

A switch 26 is connected in the'lead27 from l-the transformer to thelamp and controls the flow of current to the lamp. I

' In Fig-l 6 I'have shown a slightly modified 'formof h'oldingmeansforsecuring the mir- "metal and which overlap the edges of the ror tothe-metalcover. *Infthis modification, instead-ofemploying thebolt 23andthe lugs "24 the cover'has been constructed with a lura'lity oftongues 28 that are cut from 'the mirror and; serve-to hold themirror'in proper relation with respectto themetal cover. "The asbestoscover is'quite thick and-serves to absorb the heat ,so assto-prevent alarge amount-of heat from being radiated from the the heat. hen the lampis in operation a considerable amount of heat is projected out- -wardlythrough the opening 11 and if this should be su'flicient :to causediscomfort the 05 'opening-can-be. closed bymeans of a trans- *striketheelyes.

lamp is employed, it sometimes becomes necessarytodecrease the size ofthe opening so as'"to'diminish the amount of light that is 1 projected,,and this is-accomplished by turning the metal cover with respect to theas- :hestoscouernntil the two assume a position somewhat likethat shownin Fig. 5. .VVhen the two covers a re to be rotated relative to eachother, clamping ring 16 must be adjust-- ed. soi*that this rotation canbe effected as readil as desired.

In 8 aslightly difi'erent formofmirror has beenshown. The mirror'shownin this figure "has a downwardly extendingsemicir cularportion 21athat covers'the'corresponding'part12 of the covers. With .thejform of 1mirrorshownin Fig. 8 a little larger field of view is obtainedbut theoperationofthe device 'remains the same.

Since fthe'upper' portion of the reflector is covered "by the opaquepontions of "the two 'cove'rs, it is evidentthatit is practicallywithout e'fiect forthepurposeeofprojecting light, p5

"reflector as shown in Fig. 9. In the form shown in Fig. 9 theupper'portion-ofthe re- I i p {'fle ctor instead-ofbeing curved is bentincircle "and is also 7 provided :wit bevelled wardlyso asto form aflatsurface 31 that' is covers and other part-sfmay be secured'tof-thisreflector-mate manner described above.

In Fig. '11 I have shown the manner 'in designated'by numeral 32 andthe"image in the mirror-is viewed along 1ines' 33 and "34. The covers. formshields that protect the eye frcm'Ftheglare'of the lamp or reflector and'aISdinterc'e t the heat rays so thatthedevice can'be emp oyedwith'comfort and without afiectin the eyes as would be the case ifstrong cams of lightwere permitted to" a A lamp ke the onedescribedabove is especially well adapted for use bydentists, but is also:fisfiil for surgeons and physicians generally. Lamps constructed asabove"de-' scribed are alsow'ell adapted for home use b9- cause with theordinary arrangement. of

. lights and mirrors provided in the;usual resi lamp and it also:protects themirror' against dence,'it is practically impossible for aperand it is therefore possible to modify the" 3 parallel "with the axisof the refiector. The 2 means of a bolt'23 and'two' lugs 24. Theflugssontoinspect his' teeth andforthis reason the teeth are seldom kept inas good condition as they wouldbe if a convenient and satisfactory meanswere at hand for viewing them properly 'illuminated.v "When the lamp isused for giving heat or other therapeutic ray treatment it is sometimesdesirable to provide a conduit that extends from the lamp to the mouthor other part that is to be treated, so as to prevent undue dispersionof the rays with consequent loss of effect. In Fig. 1 such a conduit hasbeen indicated by dotted lines.

Having described the inventions what is claimed as new is;

1. A device of the character described, comprising, in combination, aconcave reflector, a lamp located within the. reflector, an asbestoscover secured to the open end of the reflector, the asbestos coverhaving an opening extending on a curved line partly but not whollyaround the edge of the reflector through which a portion of thereflector between the lamp and the outer edge thereof can be seen,another cover located on the outside of the asbestos cover, means forholding the asbestos cover against rotation, means for securing bothcovers against the open end of the reflector, the outer cover beingrotatable on the asbestos cover and a mirror secured to the outer cover.i

2. A device of the character described, comprising, in combination, aconcave reflector, a lamp located within the reflector, an asbestoscover secured to the open end of the reflector, the asbestos coverhaving an opening extending on a curved line partly but not whollyaround the edge e of the reflector through which a portion of thereflector between the lamp and the outer edge thereof can be seen,another cover located on the outside of the asbestos cover, means forholding the asbestos cover against rotation, means for securing bothcovers against the open end of. the reflector, the outer cover beingrotatable on the asbestos cover, a mirror secured to-the I outer coverand lugs projecting from the metal cover for use in turning the same.

In testimony whereof I afiix mysignature.

HARRY B. WALTHERS.-

